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SKU:
fs8-wj
McDonnell & Miller Flow Switch FS8-WJ
The McDonnell & Miller Series FS8-W is a general-purpose paddle-type flow switch designed to detect liquid flow in pipes from 1 to 6 inches. It is distinguished by its NEMA 4X-rated enclosure, making it suitable for outdoor or wash down environments where moisture, dust, or corrosion are concerns.
*The FS8-W is the weather-protected version of the FS4-3, ideal when the flow switch must be installed in locations exposed to rain, humidity, or corrosive atmospheres.
| Feature | Description |
|---|---|
| Enclosure Rating | NEMA 4X (water-tight, dust-tight, corrosion-resistant) |
| Switch Type | SPDT (Single Pole Double Throw) snap switch |
| Connection Size | 1″ NPT male thread |
| Wetted Material | Sealed Monel bellows (corrosion-resistant nickel-copper alloy) |
| Paddles Included | Four stainless steel paddles: 1″, 2″, 3″, and 6″ (25, 50, 80, 150 mm) |
| Adjustability | Sensitivity adjusting screw for easy flow setting |
Technical Specification
| Specification | Value |
|---|---|
| Maximum Operating Pressure | 160 psi (11.3 kg/cm²) |
| Maximum Temperature | 225°F (107°C) |
| Minimum Temperature | 32°F (0°C) |
| Controllable Flow Range | 9 – 167 GPM (depending on pipe size and paddle selection) |
| Maximum Flow Velocity | 6.53 ft/sec |
| Electrical Rating (Motor) | 7.4A Full Load / 44.4A Locked Rotor at 120VAC; 3.7A / 22.2A at 240VAC |
| Pilot Duty Rating | 125 VA at 120 or 240 VAC, 50/60 Hz |
| Dimensions (W x H) | 3-1/4″ x 8-3/8″ (83 x 213 mm) |
| Approvals | UL listed, CSA certified, CE approved |
